AudioCodes Mediant 800 User Manual page 1273

CHAPTER 72 Configuration Parameters Reference
Parameter
'PRACK Mode'
prack-mode
[PrackMode]
'Enable Early Media'
early-media
[EnableEarlyMedia]
'Enable Early 183'
early-183
[EnableEarly183]
[IgnoreAlertAfterEarlyMed
ia]
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Determines the PRACK (Provisional Acknowledgment)
mechanism mode for SIP 1xx reliable responses.
■ [0] Disable
■ [1] Supported (default)
■ [2] Required
Note:
■ The Supported and Required headers contain the '100rel' tag.
■ The device sends PRACK messages if 180/183 responses
are received with '100rel' in the Supported or Required
headers.
■ The parameter is applicable only to the Gateway application.
Global parameter enabling the Early Media feature for sending
media (e.g., ringing) before the call is established.
You can also configure this feature per specific calls, using IP
Profiles (IpProfile_EnableEarlyMedia) or Tel Profiles (TelProfile_
EnableEarlyMedia). For a detailed description of the parameter
and for configuring the feature, see
Configuring Tel Profiles.
Note: If the feature is configured for a specific profile, the
settings of the global parameter is ignored for calls associated
with the profile.
Global parameter that enables the device to send SIP 183
responses with SDP to the IP upon receipt of INVITE messages.
You can also configure this feature per specific calls, using IP
Profiles (IpProfile_EnableEarly183). For a detailed description of
the parameter and for configuring this feature in the IP Profiles
table, see Configuring IP
Note: If this feature is configured for a specific IP Profile, the
settings of this global parameter is ignored for calls associated
with the IP Profile.
Defines the device's interworking of Alerting messages for IP-to-
Tel calls (ISDN). It determines whether the device sends a 180
Ringing response to the caller after the device sends a 183
Session Progress response to the caller. The 180 Ringing
response indicates that the INVITE has been received by the
ISDN side and that alerting is taking place (i.e., ISDN Progress
message), indicating to the IP PBX to play a ringback tone. The
183 Session Progress response allows an early media session to
be established prior to the call being answered, for example, to
hear a ring tone, busy tone or recorded announcement.
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Mediant 800 Gateway & E-SBC | User's Manual
Description
Configuring IP Profiles
Profiles.
or